<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>珊瑚橙登录</title>
    <style>
        :root {
            --coral: #FF7F50;
            --deep-orange: #FF5722;
            --sand: #F4A460;
        }
        
        body {
            margin: 0;
            height: 100vh;
            background: linear-gradient(135deg, #FFDAB9, #FFB6C1);
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }
        
        .coral-card {
            width: 350px;
            padding: 40px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(255, 127, 80, 0.2);
            position: relative;
            overflow: hidden;
        }
        
        .coral-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, var(--coral), transparent 60%);
            opacity: 0.1;
            animation: rotate 15s linear infinite;
        }
        
        @keyframes rotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        h2 {
            color: var(--deep-orange);
            text-align: center;
            margin-bottom: 30px;
            position: relative;
        }
        
        .input-group {
            position: relative;
            margin-bottom: 25px;
        }
        
        input {
            box-sizing: border-box;
            width: 100%;
            padding: 15px 20px;
            background: rgba(255, 255, 255, 0.7);
            border: 2px solid var(--sand);
            border-radius: 50px;
            color: #333;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        input:focus {
            outline: none;
            border-color: var(--coral);
            box-shadow: 0 0 10px rgba(255, 127, 80, 0.3);
        }
        
        label {
            position: absolute;
            left: 20px;
            top: 15px;
            color: var(--sand);
            transition: all 0.3s;
            pointer-events: none;
        }
        
        input:focus + label,
        input:valid + label {
            top: -10px;
            left: 15px;
            font-size: 12px;
            background: white;
            padding: 0 5px;
            color: var(--deep-orange);
        }
        
        button {
            width: 100%;
            padding: 15px;
            background: linear-gradient(to right, var(--coral), var(--deep-orange));
            border: none;
            border-radius: 50px;
            color: white;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 127, 80, 0.4);
        }
        
        .bubble {
            position: absolute;
            background: rgba(255, 255, 255, 0.6);
            border-radius: 50%;
            animation: float 5s infinite ease-in-out;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }
    </style>
</head>
<body>
    <div id="bubbles"></div>
    
    <div class="coral-card">
        <h2>夏日通行证</h2>
        <div class="input-group">
            <input type="text" id="coral-user" required>
            <label for="coral-user">用户名</label>
        </div>
        <div class="input-group">
            <input type="password" id="coral-pass" required>
            <label for="coral-pass">密码</label>
        </div>
        <button>立即登录</button>
    </div>

    <script>
        // 创建气泡背景
        const bubblesContainer = document.getElementById('bubbles');
        for (let i = 0; i < 15; i++) {
            const bubble = document.createElement('div');
            bubble.classList.add('bubble');
            bubble.style.width = `${10 + Math.random() * 30}px`;
            bubble.style.height = bubble.style.width;
            bubble.style.left = `${Math.random() * 100}%`;
            bubble.style.top = `${Math.random() * 100}%`;
            bubble.style.opacity = 0.3 + Math.random() * 0.5;
            bubble.style.animationDuration = `${5 + Math.random() * 10}s`;
            bubble.style.animationDelay = `${Math.random() * 5}s`;
            bubblesContainer.appendChild(bubble);
        }
    </script>
</body>
</html>